docs: def get(self, option, fallback=None, **kwargs):
          """Get an option value.
  
          Unless `fallback` is provided, `None` will be returned if the option
          is not found.
  
          """
          # keyword-only arguments
          kwargs.setdefault('raw', False)
          kwargs.setdefault('vars', None)
          _impl = kwargs.pop('_impl', None)
          # If `_impl` is provided, it should be a getter method on the parser
          # object that provides the desired type conversion.
          if not _impl:
              _impl = self._parser.get
          return _impl(self._name, option, fallback=fallback, **kwargs)